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1. (25 points) A regional manager wants to know if there is a difference between the mean amount of time that customers wait in line at the drive-thru window for three stores in her region. She randomly samples wait times at each store. Her data is given in the table to the right. (Using formulas) Test the claim that there is a difference between the mean drive- thru wait times for the three stores at the 0.01 significance level. Assume that drive-thru wait times at each store are normally distributed with equal variances Drive-Thru Wait Times (in Minutes) Store A Store B Store C 1.75 1.85 1.91 2.36 3.38 3.40 1.32 1.45 1.45 0.81 1.49 1.52 1.62 1.76 1.81 1.82 1.78 1.83 1.92 2.01 4.01
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